Electrical apparatus



0 n 2 me 1 T2 9 m 5 WA, m m 6 7% w m YW w B s U) N Em L LMO A wm 2 .RF aL.m E8 1 r 0 Q 3 9 1 3 2 Y M Patented May 23, 1939 UNITED STATES PATENTOFFICE ELECTRICAL APPARATUS Original application October 13, 1930,Serial No. Divided and this application April 3,

1937, Serial No. 184,905

dclaims.

6 term of internal combustion engines should be capable of'oneration atrelatively high voltages without at the same time setting up an ob-.

Jectionable condition of interference with the proper operation ofsignaling or communicating o apparatus customarily employed on the samevehicle as that which houses the internal combustion engine, andoperating upon currents or other electrical energy of radio frequency;and it is an object of the present invention to provide an inductioncoil so constructed and housed that it will be capable of operation atrelatively high 'voltages without the setting up of any such ob-Jectionable condition as that above indicated.

Other features of the invention reside in the specific combinations andassociation 'of parts, considered both electrically and physically, aswill appear more fully from the following description, when read withreference to the accompanying drawing. It is to be understood, however,that the drawing is for the purpose of illustration only and is notdesigned as a definition of the limits of the invention, reference beinghad for this purpose to the appended claims.

In the drawing,

Fig. 1 shows, partially in diagram and partially in central section, theinvention applied to an ignition system of an internal combustion en-Fig. 2 is a view in elevation, with part of the housing broken away toreveal the energization controlling means; and

Fig. 3 is a transverse sectional view along line 3-3 of Fig. 2.

Referring to the drawing, and particularly to Fig. 1, the invention istherein shown embodied in an induction coil consisting of a primarywinding 92 wound upon a suitable core and a secondary winding I! woundupon the primary winding 12, but separated therefrom by an insulatingwrapper (as shown in my original application No. 488,495, filed October13, 1930). A spring contact 98 lies within the range of the magneticfield of the coil 92, 93 and is adapted to be drawn toward the w core,thus creating a gap between the contact post gs sleeve III, which servesto ground the circuit through the longitudinally mating metallic casingsections 05, 86 enclosing the parts above enumerated, and operating toshield the said parts against the sending out of electro-magneticdisturbances which may interfere with radio equipment located adjacentthe said parts.

Within the metallic casing 85, 88 is a sleeve of suitable insulatingmaterial cooperating with end plates, likewise of insulating material(as shown in my original application, above identified), to completelyenclose the coils above referred to, except for conductor openings.There is one such opening in the forward end plate to allow passagetherethrough of a conductor terminating in a terminal screw 91 servingfor attachment of one end of the spring contact or armature 98 abovereferred to.

One end of casing 85 is shown as apertured centrally (Fig. 2) to permita rod It! to pass into the casing for operative connection with a pin I05 of insulating material. As shown, one end of the pin I05 normallyabuts the resilient armature 98, and in response to the urge of a springI06 acts to maintain said armature 98 flexed rearwardly suillciently toseparate contact 96 from the contact post 99, the pin I05 beingsupported for sliding movement by any suitable means, preferably thebracket llil previously described. Any suitable means may be providedfor withdrawing the pin it! by the exertion of a pull on the end of therod Ill to thereby overcome the pressure of the spring Hi6. As shown,such means takes the form of a flexible link, the tension of which iscontrolled by the coil portion III9 thereof, and the ends of which areconnected respectively to the rod I01, as indicated at H0, and to onearm 14 of a bell crank (Fig. 1) constituting part of an engine crankingclutch actuating mechanism of a type disclosed and claimed in myco-pending application Serial No. 488,495, filed October 13, 1930, ofwhich the present application is a division. The other arm 13 of thebell crank is shown as manually operable through the instrumentality ofa plunger 49 having the added function of controlling the joinder ofcontacts 50 and ii in the circuit to the electric starting motor 44. Forclaim's to the motor energizing and clutch actuating functions of theplunger 49, either per se or in combination with the ignitioncontrolling function thereof, reference is to be had to my copendingapplication above identified or some other division thereof; the claimsherein being to the induction coil structure per se.

From the foregoing it will be apparent that upon application of anoutward pull on the plung or 49 the connecting rod lul oi the ignitioncell will be pulled to the right, as viewed in Fig, l, by means of theconnection with the hell crank it, thereby permitting the springarmature 88 to move the contact 86 into engagement with contact 95 andthus place the parts in condition for electro-= magnetic actuation byreason of the flow oi cur= rent from battery ii to the primary winding92, to begin the process of alternate breaking and making of the primarycircuit, with resultant high tension impulses in the secondary circuit,to provide a shower oi iuel igniting sparks across the gap I 04.

As shown best in Fig. 3, the sections 85 and 86 of the casing havemating extensions 920, Ml, respectively, which are held (by suitablemeans 81) in abutting relationship along a plane of the axis ofconductor I03.

Although the invention has been described in connection with a specificembodiment and application, to wit, iuel ignition, the principlesinvolved are susceptible of numerous other applications which willreadily occur to persons skilled in the art. The invention is thereforeto he limited only as indicated by the scope or the appended claims.

What is claimed is: A

1. In a device of the class described, in combination with a sectionalhousing having two registering semi-cylindrical sections, a coilconsisting of primary and secondary windings disposed within saidhousing, and means to electrically connect said secondary winding with acurrent consuming device, said last named means includ= ing a currentconducting wire, an insulating covering for said wire, and an outwardlyextending boss integral with, and projecting radially from said housingto enclose and protect said conductor and its insulating covering.

2. In a device of the class described, in combination with a housinghaving two registering semi-cylindrical sections, a coil consisting ofprimary and secondary windings disposed within said housing, and meansto electrically connect said secondary windingwith a. current consumingdevice, said last named means including a current conducting wire, aninsulating covering for said wire, and means disposed radially oi. saidhousing to enclose and electrostatically shield said conductor.

3. In a device of the class described, in comloination with a housinghaving two registering semi-cylindrical sections, a coil consisting ofprimary and secondary windings disposed within said housing, and meansto electrically connect said secondary winding with a current consumingdevice, said last named means including a flexible current conductorextending from said housing, and means integral with said housing forprotecting said conductor.

4'. In a device of the class described, in comloination with a housinghaving two registering semi-cylindrical sections, a coil consisting ofprimary and secondary windings disposed within said housing, and meansto electrically connect said secondary winding with a current consumingdevice, said last named means including a flexible current conductorextending from said housing, and means disposed radially of said housingfor protecting said conductor.

5. In a device of the class described, in com bination with a sectionalhousing, a coil consisting of primary and secondary windings disposedwithin said housing, and means to electrically connect said secondarywinding with a current consuming device, said last named means ineludinga flexible current conductor extending from said housing, and meansdisposed radially of said housing for protecting said conductor, saidprotecting means including a centrally split conductor housing, one halfof which is integral with one section of said coil housing, the otherhalf being integral with the second section of said coil housing.

6. In a device of the class described, in combination with an inductioncoil, a substantially cylindrical housing for said coil, having twosemicylindrical sections Joining along a plane passing through the coilaxis, said coil consisting of primary and secondary windings, and meansto electrically connect the secondary winding with a current consumingdevice, said last named means including a current conducting wireentering said housing along the plane of joinder of the housingsections.

JOSEPH W. ALLEN.

